Research data for manuscript entitled: Pressure as a synthetic game changer. Towards room temperature, solvent-free and organocatalysed synthesis of star-shaped poly(γ-butyrolactone)s

Star-shaped poly(γ-butyrolactone), long considered out of reach, is now produced in just 15 minutes via a solvent- and metal-free ring-opening polymerization (ROP) mediated by organocatalyst (1,5,7-triazabicyclo[4.4.0]dec-5-ene, TBD) at room temperature. Achieving >1 g per batch (yield 60%) and delivering well-defined polymers (Mn = 3,700-14,600; Đ = 1.05-1.41), this non-toxic, robust and scalable approach shows that pressure can unlock new frontiers in sustainable polymer design.The included data present the results of size-exclusion chromatography (SEC), DSC, MALDI TOFF and NMR measurements. They were collected as part of the study of pressure-assisted ring-opening polymerization of γ-butyrolactone using a solvent-free protocol and 1,5,7-triazabicyclo[4.4.0]dec-5-ene as a catalyst under high-pressure conditions (up to 1000 MPa) at room temperature.